Page 48 - Demo

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WAVES & SOUND
Waves and Sound—
Standing Wave Generator
Inexpensive yet reliable and durable stand- ing wave generator makes the principles of wavelength, amplitude, nodes and antinodes concrete for students. The highly visible apparatus measures four feet in height and allows for the study of the first, second,
third and even fourth harmonic! Includes the standing wave generator apparatus, an instruction guide with a detailed proce- dure section and an extensive background section.
AP6161 | $28.55
Student Laboratory Kit
Explore wave and sound properties at hands-on activity stations. Study longitu- dinal and transverse waves with springs, observe how wavelength and frequency are related, investigate wave intereference and patterns, determine the speed of sound in air, experiment to examine variables affecting resonance frequency and understand the Doppler effect. Instructions, Teacher Notes and necessary materials are provided. AP7014 | $134.20
Ripple Tank Apparatus
A proven method for studying wave/optics principles. This sturdy molded plastic tank features a viewing area larger than other ripple tanks. Plate glass bottom ensures projection of distortion-free wave images. Foam beaches reduce reflections.The 1.5-volt motor on a rippler bar generates straight and circular waves and is equipped with a counterweight for varying wave amplitude. Requires a 6-V DC low-voltage power power supply and a high-power light source. A Bull’s-Eye Level is recommended and available separately.
AP5705 | Ripple Tank Apparatus | $413.80 AP6411 | Bull’s-Eye Level | $10.60
Tuning Forks
Finest quality aluminum alloy tuning forks have exceptional tone duration and superior sound. Set of four includes 256-C, 320-E, 385-G and 512-C. Set of eight includes the set of four plus the premium 288-D, 341.3-F, 426.7-A and 480-B. Tuning fork activator and rubber mallet also available.
Sympathetic and Differential
CATALOG NO.
DESCRIPTION
PRICE/EACH
Tuning Forks, Set of 4
Tuning Forks, Set of 4, Premium
Tuning Forks, Set of 8
Tuning Forks, Set of 8, Premium
Tuning Fork Activator
Rubber Mallet for Tuning Forks
AP6984 AP9032 AP6982 AP9242 AP6422 AP9039
$40.85 50.40 71.30 89.15 14.20
6.65
Get a tuning fork to sing out its note without ever touching it with this high-quality set. Set both forks at the same frequency with the open ends of the resonating boxes facing each other. Excite one fork to instill sympa- thetic resonance and then dampen it. The note on the other fork “rings on.” Explore what happens when two tuning forks sound at different frequencies by using the adjust- able weights on one of the tuning forks. AP5724 | $139.65
Tuning Fork Set
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